Welding tool for heat shield

Abstract

The utility model relates to a heat shield welding tool which comprises a base, and an end flange positioning mechanism is arranged on one side of the base and used for positioning a flange at the end of a workpiece. The pipeline positioning mechanism is arranged on the side, away from the end flange positioning mechanism, of the base and used for positioning a pipeline of the workpiece. The heat shield supporting and clamping mechanisms are arranged on the base and located between the end flange positioning mechanism and the pipeline positioning mechanism, and the multiple heat shield supporting and clamping mechanisms are arranged in the extending direction of the heat shield. The heat shield pressing mechanisms are arranged above the heat shield supporting and clamping mechanisms and correspond to the multiple heat shield supporting and clamping mechanisms, so that the problems that in the prior art, an exhaust pipe heat shield is large in welding difficulty and prone to deformation are solved, and the welding quality and the welding efficiency of the heat shield are improved.

Description

Technical Field

[0001] This utility model relates to the field of welding fixture technology, specifically to a welding fixture for a heat insulation cover. Background Technology

[0002] A car's exhaust system mainly includes the exhaust manifold, exhaust pipe, and muffler. A catalytic converter, which controls engine emissions, is also typically installed in the exhaust system. The exhaust pipe generally includes a front exhaust pipe and a rear exhaust pipe. Because car exhaust gases are quite hot, a heat shield is needed to cover the outside of the exhaust pipe.

[0003] Because the heat shield itself is made of thin material, it is easy to deform. In addition, the exhaust pipe itself is curved. The fit between the exhaust pipe and the heat shield is not good when assembled manually. Furthermore, the relative positions of the upper and lower heat shields are unstable, resulting in a high frequency of deformation or burn-through during welding, and low production efficiency. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a welding fixture for heat insulation covers, which solves the problems of high welding difficulty and easy deformation of exhaust pipe heat insulation covers in the prior art, thereby improving the welding quality and efficiency of heat insulation covers.

[0005] This utility model provides a welding fixture for a heat insulation cover to solve the above-mentioned technical problems, including:

[0006] Base

[0007] An end flange positioning mechanism is located on one side of the base and is used to position the flange at the end of the workpiece.

[0008] A pipe positioning mechanism is located on the side of the base away from the end flange positioning mechanism, and is used to position the pipe of the workpiece.

[0009] A heat insulation cover support and clamping mechanism is provided on the base and located between the end flange positioning mechanism and the pipe positioning mechanism. Multiple sets of the heat insulation cover support and clamping mechanism are arranged along the extension direction of the heat insulation cover.

[0010] The heat insulation cover clamping mechanism is located above the heat insulation cover support clamping mechanism and corresponds to multiple sets of the heat insulation cover support clamping mechanisms.

[0011] Furthermore, the heat insulation cover support clamping mechanism includes a support mechanism and a clamping mechanism. The clamping mechanism includes two jaws disposed on the support mechanism. The two jaws are respectively disposed on both sides of the heat insulation cover in the radial direction and can clamp or open simultaneously.

[0012] Furthermore, the support mechanism includes a lower shell support fixed to the base and a lower shell support block fixed to the upper end of the lower shell support. The lower shell support is provided with a mounting cavity.

[0013] The clamping mechanism also includes a turntable rotatably disposed in the mounting cavity. Two sets of first shafts are eccentrically arranged on the turntable and are equally angularly distributed along the circumference of the turntable. First connecting rods are hinged to the first shafts. The other ends of the two first connecting rods are respectively hinged to the bottom ends of the two grippers. The middle part of the grippers is hinged to the lower half shell support seat. The upper end of the grippers can be pressed against the heat insulation cover.

[0014] Furthermore, the turntable is eccentrically provided with a second shaft, which is located between the two sets of first shafts and is arranged at equal angles to the two sets of first shafts. The two side plates of the lower shell support are provided with arc-shaped guide holes. The two ends of the second shaft move through the arc-shaped guide holes and are hinged to one end of the second connecting rod. The other end of the second connecting rod is hinged to an eccentric block hinged to the base. The eccentric block is provided with a first wrench.

[0015] Furthermore, the lower shell support block has clearance grooves on both sides to allow the grippers to make room.

[0016] Furthermore, the end flange positioning mechanism includes a first mounting base fixed to the base and a sliding seat slidably disposed on the first mounting base, wherein a first positioning mechanism is provided between the sliding seat and the first mounting base.

[0017] The sliding seat is equipped with a flange clamping mechanism and a flange positioning block.

[0018] The flange clamping mechanism includes a movable component located on the side of the flange positioning block away from the heat insulation cover support clamping mechanism. Two sets of first arc-shaped arms are hinged to the movable component. A second arc-shaped arm is hinged to the other end of each first arc-shaped arm. The middle portion of the second arc-shaped arm is hinged to the flange positioning block. A clamping claw extending towards the center of the flange positioning block is fixed to the other side of the second arc-shaped arm away from the first arc-shaped arm.

[0019] A first drive rod is fixed on the movable part. The other end of the first drive rod moves through the first guide cylinder fixed on the sliding seat and is hinged to the first arm. The first arm is hinged to the middle of the second wrench, and one end of the second wrench is hinged to the sliding seat.

[0020] Furthermore, the pipe positioning mechanism includes a support plate fixed on the base, and the support plate is provided with at least one set of corresponding pipe positioning blocks and pipe clamping blocks. The pipe clamping blocks clamp or release the pipe of the workpiece using quick clamps.

[0021] Furthermore, the quick clamp includes a hinge seat disposed on the support plate, and a clamping arm is hinged to one corner of the hinge seat away from the support plate and the pipe positioning block via a third axis. The other end of the clamping arm is fixed to the pipe clamping block.

[0022] A third wrench is hinged to one corner of the hinged seat near the support plate and the pipe positioning block via a fourth axis.

[0023] A drive arm is also hinged to the clamping arm via a fifth axis. The drive arm is located on the side of the hinge base away from the support plate, and the side of the hinge base away from the support plate is provided with a guide surface that cooperates with the drive arm.

[0024] The other end of the drive arm is hinged to the side of the third wrench away from the hinge seat via a sixth axis.

[0025] Furthermore, the heat insulation cover clamping mechanism includes a fixed seat connected to the base, a lifting seat that moves up and down relative to the fixed seat, and an upper shell clamping block fixed on the lifting seat. The lifting seat is provided with at least one second drive rod. The upper end of the second drive rod moves through the second guide cylinder on the fixed seat and is fixed to the limiting block. The limiting block is also provided with a telescopic cylinder. The other end of the telescopic cylinder is connected to the fixed seat. A manual control mechanism is provided between the fixed seat and the lifting seat.

[0026] Furthermore, it also includes a base, which is rotatably connected to the base, and a second positioning mechanism is provided between the base and the base.

[0027] The beneficial effects of this utility model are as follows: The base supports the entire device; the end flange positioning mechanism fixes the flange at one end of the exhaust pipe, thus limiting the position of one end of the exhaust pipe; the pipe positioning mechanism fixes the pipe at the other end of the exhaust pipe. The position of the exhaust pipe is thus fixed through the end positioning mechanism and the pipe positioning mechanism. The heat insulation cover clamping mechanism presses the upper half of the heat insulation cover onto the lower half, ensuring the stability between the upper and lower half of the heat insulation cover, thereby reducing the probability of deformation during welding and improving the welding quality. Multiple sets of heat insulation cover support and clamping mechanisms arranged along the extension direction of the heat insulation cover provide multi-point support and clamping fixation, ensuring a close fit between the heat insulation cover and the exhaust pipe. This guarantees the stability of the upper and lower half of the heat insulation cover, reduces the possibility of deformation during welding, and improves the welding efficiency and effect of the heat insulation cover. In summary, by employing this utility model, the position of the exhaust pipe can be fixed through the end flange positioning mechanism and the pipe positioning mechanism. The upper and lower shells of the heat insulation cover can be stably fitted onto the exhaust pipe and fit snugly through the heat insulation cover pressing mechanism and the heat insulation cover support clamping mechanism. This ensures that the side positions of the upper and lower shells of the heat insulation cover are aligned and their relative positions are stable, reducing the probability of deformation or displacement of the heat insulation cover during welding and improving the quality and efficiency of heat insulation cover welding.

[0028] In use, place the lower half of the heat insulation cover on the support mechanism of the heat insulation cover support clamping mechanism, then insert the exhaust pipe into the lower half of the heat insulation cover. The flange at one end of the exhaust pipe is pressed and positioned by the end flange positioning mechanism, and the pipe section of the exhaust pipe is fixed by the pipe positioning mechanism. Then, place the upper half of the heat insulation cover on the exhaust pipe. At this point, the extended side of the upper half of the heat insulation cover is located inside the extended side of the lower half of the heat insulation cover. The curvature of the heat insulation cover itself allows for... The position between the upper and lower shells of the heat insulation cover is determined; then, the upper shell of the heat insulation cover is pressed onto the lower shell of the heat insulation cover by the heat insulation cover pressing mechanism, thus pre-positioning the upper and lower shells of the heat insulation cover; finally, the clamping mechanism of the heat insulation cover support clamping mechanism clamps both sides of the heat insulation cover in the radial direction, so that the extension side of the lower shell of the heat insulation cover is pressed onto the extension side of the upper shell of the heat insulation cover and fits between it and the exhaust pipe, which facilitates welding between the upper and lower shells of the heat insulation cover.

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of this utility model;

[0031] Figure 2 This is the end flange positioning mechanism of the present invention;

[0032] Figure 3 This utility model relates to a pipeline positioning mechanism.

[0033] Figure 4 This utility model provides a heat insulation cover support and clamping mechanism.

[0034] Figure 5 This is the heat insulation cover pressing mechanism of this utility model.

[0035] In the attached diagram: 100 - base, 200 - end flange positioning mechanism, 210 - first mounting seat, 220 - sliding seat, 221 - flange positioning block, 222 - first guide cylinder, 230 - first positioning mechanism, 240 - flange clamping mechanism, 241 - moving part, 242 - first arc-shaped arm, 243 - second arc-shaped arm, 244 - clamping claw, 245 - first drive rod, 246 - first arm, 247 - second wrench, 300 - pipe positioning mechanism, 310 - support plate, 311 - pipe positioning block, 312 - pipe clamping block, 320 - quick clamp, 321 - hinge seat, 3211 - guide surface, 322 - third axis, 323 - clamping arm, 324 - fourth axis, 325 - third wrench, 326 - fifth axis, 327 - drive arm 328-Sixth axis, 400-Heat insulation cover support clamping mechanism, 410-Support mechanism, 411-Lower half shell support seat, 4111-Mounting cavity, 4112-Arc-shaped guide hole, 412-Lower half shell support block, 4121-Relieving groove, 420-Clamping mechanism, 421-Claw, 422-Turntable, 423-First axis, 424-First connecting rod, 425-Second axis, 426-Second connecting rod, 427-Eccentric block, 428-First wrench, 500-Heat insulation cover pressing mechanism, 510-Fixed seat, 511-Second guide cylinder, 520-Lifting seat, 521-Upper half shell pressing block, 522-Second drive rod, 523-Limit block, 530-Telescopic cylinder, 540-Manual control mechanism, 600-Base, 700-Second positioning mechanism. Detailed Implementation

[0036] Referring to the accompanying drawings, the specific embodiments of this utility model will be described in detail.

[0037] Reference Figures 1 to 5 This utility model provides an embodiment of a welding fixture for a heat insulation cover.

[0038] A welding fixture for a heat insulation cover includes a base 100, which is used to support the entire device.

[0039] An end flange positioning mechanism 200 is provided on one side of the base 100 and is used to position the flange at the end of the workpiece. In this embodiment, the workpiece is an exhaust pipe, that is, the flange at one end of the exhaust pipe can be fixed by the end flange positioning mechanism 200.

[0040] The pipe positioning mechanism 300 is located on the side of the base 100 away from the end flange positioning mechanism 200, and is used to position the pipe of the workpiece; the position of the exhaust pipe can be fixed by the end positioning mechanism and the pipe positioning mechanism 300.

[0041] A heat insulation cover support and clamping mechanism 400 is disposed on the base 100 and located between the end flange positioning mechanism 200 and the pipe positioning mechanism 300. Multiple sets of the heat insulation cover support and clamping mechanism 400 are arranged along the extension direction of the heat insulation cover. In this configuration, the heat insulation cover support and clamping mechanism 400 can provide multi-point support for the heat insulation cover and clamp and fix it at multiple points, ensuring a close fit between the heat insulation cover and the exhaust pipe. This guarantees the stability of the upper and lower shells of the heat insulation cover, reduces the possibility of deformation during welding, and improves the welding efficiency and effectiveness of the heat insulation cover.

[0042] A heat insulation cover clamping mechanism 500 is located above the heat insulation cover support clamping mechanism 400 and corresponds to multiple sets of the heat insulation cover support clamping mechanisms 400. At this time, the heat insulation cover clamping mechanism 500 presses the upper half of the heat insulation cover onto the lower half of the heat insulation cover, ensuring the stability of the positions of the upper and lower half of the heat insulation cover, thereby reducing the probability of deformation during heat insulation cover welding and improving the welding quality of the heat insulation cover.

[0043] In summary, by employing this utility model, the position of the exhaust pipe can be fixed by the end flange positioning mechanism 200 and the pipe positioning mechanism 300. The heat insulation cover pressing mechanism 500 and the heat insulation cover support clamping mechanism 400 can stably fit the upper and lower shells of the heat insulation cover onto the exhaust pipe and fit snugly against it. This ensures that the sides of the upper and lower shells of the heat insulation cover are aligned and their relative positions are stable, reducing the probability of deformation or displacement of the heat insulation cover during welding and improving the quality and efficiency of the heat insulation cover welding.

[0044] In some embodiments, refer to Figure 4 The heat insulation cover support clamping mechanism 400 is provided with four sets, of which three sets are horizontally arranged on the base 100 along the extension direction of the exhaust pipe, and one set is inclinedly arranged on the base 100 along the extension direction of the exhaust pipe and acts on one end of the heat insulation cover.

[0045] The heat insulation cover support and clamping mechanism 400 includes a support mechanism 410 and a clamping mechanism 420. The clamping mechanism 420 includes two jaws 421 disposed on the support mechanism 410. The two jaws 421 are respectively disposed on both sides of the heat insulation cover in the radial direction and can clamp or open simultaneously. At this time, the exhaust pipe and the lower half of the heat insulation cover are supported by the support mechanism 410. Then, the upper half of the heat insulation cover is placed on the lower half of the heat insulation cover, and the two jaws 421 of the clamping mechanism 420 clamp and position the upper and lower half of the heat insulation cover simultaneously, or open simultaneously to remove the heat insulation cover.

[0046] Furthermore, the support mechanism 410 includes a lower shell support base 411 fixed to the base 100 and a lower shell support block 412 fixed to the upper end of the lower shell support base 411. Furthermore, the lower shell support block 412 is shaped to conform to the heat insulation cover on the side closest to the heat insulation cover. The lower shell support block 412 has clearance grooves 4121 on both sides to accommodate the grippers 421. When the grippers 421 simultaneously clamp the outer side of the heat insulation cover, the grippers 421 are located within the clearance grooves 4121, and the gripper heads of the grippers 421 contact the outer wall of the heat insulation cover through the clearance grooves 4121. At this time, the lower shell support block 412 can provide support and positioning for the heat insulation cover without interfering with the grippers 421.

[0047] Furthermore, the lower shell support 411 is provided with a mounting cavity 4111, through which two clamping jaws 421 are disposed on both sides of the mounting cavity 4111. The clamping mechanism 420 includes a turntable 422 rotatably disposed in the mounting cavity 4111. Two sets of first shafts 423 are eccentrically disposed on the turntable 422 and are equally angularly distributed along the circumference of the turntable 422. First connecting rods 424 are hinged to the first shafts 423. The other ends of the two first connecting rods 424 are respectively hinged to the bottom ends of the two clamping jaws 421. The middle part of the clamping jaws 421 is hinged to the lower shell support 411. The upper end of the clamping jaws 421 can be pressed against the heat insulation cover. Furthermore, two sets of turntables 422 are arranged in parallel. The two ends of the first shaft 423 are connected to the two sets of turntables 422, and the first connecting rod 424 is located between the two sets of turntables 422. The grippers 421 are located on both sides of the mounting cavity 4111 of the lower half-shell support 411. The middle part of the gripper 421 is hinged to the two side walls of the mounting cavity 4111 through a shaft. At this time, by rotating the turntable 422, the position of the two first shafts 423 in the circumferential direction of the turntable 422 can be changed. The first shaft 423 pulls the first connecting rod 424 to move. The first connecting rod 424 pulls one end of the gripper 421 to move, so that the gripper 421 rotates around the hinge point between the gripper 421 and the lower half-shell support 411, thereby driving the other ends of the two grippers 421 to open or clamp the radial sides of the heat insulation cover.

[0048] Furthermore, a second shaft 425 is eccentrically mounted on the turntable 422. The second shaft 425 is positioned between the two sets of first shafts 423 and is arranged at an equal angle to the two sets of first shafts 423. Arc-shaped guide holes 4112 are provided on both side plates of the lower half-shell support base 411. The two ends of the second shaft 425 movably pass through the arc-shaped guide holes 4112 and are hinged to one end of the second connecting rod 426. The other end of the second connecting rod 426 is hinged to an eccentric block 427 hinged to the base 100. A first wrench 428 is provided on the eccentric block 427. At this time, by moving the first wrench 428, the eccentric block 427 can be driven to rotate around the hinge point between the eccentric block 427 and the base 100. The eccentric block 427 drives the second connecting rod 426 to move. The second connecting rod 426 pulls the second shaft 425 to move within the arc-shaped guide hole 4112, thereby driving the turntable 422 to rotate. When the first wrench 428 is pressed down towards the base 100 in a direction away from the support mechanism 410, the hinge point between the second connecting rod 426 and the eccentric block 427 rotates upward. The second connecting rod 426 pulls the second shaft 425 to rotate forward in the arc-shaped guide hole 4112, thereby driving the turntable 422 to rotate forward, so that the two first connecting rods 424 simultaneously pull the clamps 421 to loosen the heat insulation cover. When the first wrench 428 is pressed down towards the support mechanism 410, the hinge point between the second connecting rod 426 and the eccentric block 427 rotates downward. The second connecting rod 426 pulls the second shaft 425 to rotate in the opposite direction in the arc-shaped guide hole 4112, thereby driving the turntable 422 to rotate in the opposite direction, so that the two first connecting rods 424 simultaneously pull the two clamps 421 to clamp the heat insulation cover.

[0049] In some embodiments, refer to Figure 2 The end flange positioning mechanism 200 includes a first mounting base 210 fixed to the base 100 and a sliding seat 220 slidably disposed on the first mounting base 210. Further, the first mounting base 210 is provided with a slide rail, and the sliding seat 220 is provided with a slider that cooperates with the slide rail. A first positioning mechanism 230 is provided between the sliding seat 220 and the first mounting base 210, wherein the first positioning mechanism 230 is used to limit the position of the sliding seat 220, so that its position remains stable after the flange of the exhaust pipe is pressed.

[0050] The sliding seat 220 is provided with a flange clamping mechanism 240 and a flange positioning block 221. The flange positioning block 221 is used to position the flange of the exhaust pipe, and the flange clamping mechanism 240 is used to press the flange of the exhaust pipe onto the flange positioning block 221 to fix the end of the exhaust pipe.

[0051] The flange clamping mechanism 240 includes a movable member 241 located on the side of the flange positioning block 221 away from the heat insulation cover support clamping mechanism 400. Two sets of first arc-shaped arms 242 are hinged to the movable member 241. A second arc-shaped arm 243 is hinged to the other end of the first arc-shaped arm 242. The middle part of the second arc-shaped arm 243 is hinged to the flange positioning block 221. One end of the second arc-shaped arm 243 away from the first arc-shaped arm 242 extends to the other side of the flange positioning block 221 and is fixed with a pressure claw 244 extending towards the center of the flange positioning block 221. A first drive rod 245 is fixed to the movable member 241. The other end of the first drive rod 245 movably passes through a first guide cylinder 222 fixed to the sliding seat 220 and is hinged to a first arm 246. The first arm 246 is hinged to the middle part of a second wrench 247. One end of the second wrench 247 is hinged to the sliding seat 220. Furthermore, the flange positioning block 221 is also equipped with two sets of linear bearings. The outer rings of the two sets of support bearings are fixed to the movable part 241. The guide rod of the linear bearing away from the flange positioning block 221 is provided with a limiting block 523 to limit the position of the movable part 241, thereby improving the stability of the movable part 241. At this time, when it is necessary to fix the exhaust pipe, push the sliding seat 220 to move towards the flange of the exhaust pipe, so that the flange of the exhaust pipe abuts against the flange positioning block 221. Then, turn the second wrench 247 downward towards the flange positioning block 221, thereby causing the hinge point between the first arm 246 and the wrench to move downward. Through the first arm 246, push the first drive rod 245 to move towards the flange positioning block 221, thereby pushing the movable part 241 towards the flange positioning block 221. When the moving part 241 moves in the direction of 21, the movable part 241 drives the first arc-shaped arm 242, which is hinged to it, to rotate, thereby pulling the second arc-shaped arm 243 to rotate around the hinge point between the second arc-shaped arm 243 and the flange positioning block 221, causing the pressure claw 244 to press against the surface of the flange. When the hinge point between the first arm 246 and the wrench, the hinge point between the wrench and the sliding seat 220, and the hinge point between the first arm 246 and the first drive rod 245 are in a straight line, a dead point mechanism is formed to lock the state of the pressure claw 244 pressing against the flange surface.

[0052] Furthermore, the first positioning mechanism 230 includes a first positioning block disposed on the first mounting base 210 and a first limiting rod rotatably disposed on the sliding base 220. The first positioning block is provided with a first limiting groove and a second limiting groove that cooperate with the first limiting rod. When the pressure claw 244 presses against the flange surface, the first limiting rod rotates and engages in the second limiting groove, thereby fixing the position of the sliding base 220 and ensuring that the end flange positioning mechanism 200 fixes the end of the exhaust pipe.

[0053] In some embodiments, refer to Figure 3The pipe positioning mechanism 300 includes a support plate 310 fixed to the base 100. The support plate 310 has at least one set of corresponding pipe positioning blocks 311 and pipe clamping blocks 312. The pipe clamping blocks 312 clamp or release the pipe of the workpiece using quick-clamping clamps 320. Further, the pipe positioning block 311 is an L-shaped positioning block. The pipe clamping block 312 can be clamped onto the opening of the L-shaped positioning block by the quick-clamping clamps 320, thus fixing the exhaust pipe. Further, pads are provided on the inner sides of both the pipe positioning blocks 311 and the pipe clamping blocks 312 to prevent damage to the pipe. In this embodiment, two sets of pipe positioning blocks 311 and pipe clamping blocks 312 are provided.

[0054] The quick clamp 320 can be any existing model, as long as it can press the pipe clamping block 312 onto the exhaust pipe. In this embodiment, the quick clamp 320 is model Clamptek CH12265. Specifically, the quick clamp 320 includes a hinge seat 321 on the support plate 310. A clamping arm 323 is hinged to one corner of the hinge seat 321 away from the support plate 310 and the pipe positioning block 311 via a third shaft 322. The other end of the clamping arm 323 is fixed to the pipe clamping block 312. A fourth shaft 324 is used to connect one corner of the hinge seat 321 near the support plate 310 and the pipe positioning block 311. A third wrench 325 is hinged to the clamping arm 323, and a drive arm 327 is also hinged to the clamping arm 323 via a fifth shaft 326. The drive arm 327 is located on the side of the hinge seat 321 away from the support plate 310, and the side of the hinge seat 321 away from the support plate 310 is provided with a guide surface 3211 that cooperates with the drive arm 327. The other end of the drive arm 327 is hinged to the side of the third wrench 325 away from the hinge seat 321 via a sixth shaft 328. When it is necessary to fix the exhaust pipe, the third wrench 325 is moved toward the pipe clamping block 312. The drive arm 327 drives the clamping arm 323 to rotate around the third axis 322, so that the pipe clamping block 312 on the clamping arm 323 is pressed against the exhaust pipe. When it is necessary to open, the third wrench 325 is moved away from the pipe clamping block 312. At this time, the third wrench 325 first drives the drive arm 327 to rotate around the fifth axis 326. When the drive arm 327 rotates to contact the guide surface 3211, the third wrench 325 continues to rotate. The drive arm 327 will rotate around the contact position between the drive arm 327 and the guide surface 3211, and then continue to drive the clamping arm 323 to rotate around the third axis 322 away from the pipe positioning block 311, thus loosening the exhaust pipe.

[0055] In some embodiments, refer to Figure 5The heat insulation cover pressing mechanism 500 includes a fixed seat 510 connected to the base 100, a lifting seat 520 that moves up and down relative to the fixed seat 510, and an upper shell pressing block 521 fixed on the lifting seat 520. The side of the upper shell pressing block 521 near the heat insulation cover is shaped to conform to the outer side of the heat insulation cover.

[0056] The lifting seat 520 is provided with at least one second drive rod 522. Preferably, there are two sets of second drive rods 522. The upper end of the second drive rod 522 movably passes through the second guide cylinder 511 on the fixed seat 510 and is fixed to the limiting block 523. The limiting block 523 is also provided with a telescopic cylinder 530, and the other end of the telescopic cylinder 530 is connected to the fixed seat 510. The telescopic rod can be an electric telescopic cylinder 530 or a pneumatic cylinder. In this way, when the heat insulation cover needs to be pressed, the telescopic end of the telescopic cylinder 530 retracts, driving the limiting block 523 to move downward. The limiting block 523 drives the lifting seat 520 to move downward through the second drive rod 522, so that the upper shell pressing block 521 on the lifting seat 520 presses against the heat insulation cover. When the heat insulation cover needs to be released, the telescopic end of the telescopic cylinder 530 extends, driving the limiting block 523 to move upward, which in turn drives the lifting seat 520 to move upward and release.

[0057] Furthermore, a manual control mechanism 540 is provided between the fixed base 510 and the lifting base 520 to improve the flexibility of the device. Specifically, the manual control mechanism 540 includes a second arm hinged to the fixed base 510, a fourth wrench on the second arm, and the other end of the second arm hinged to a third arm. The other end of the third arm is hinged to the lifting base 520. In this way, the second and third arms can be rotated by turning the fourth wrench, so that the second and third arms fold at an angle, causing the lifting base 520 to rise. Alternatively, the lifting base 520 can be lowered by turning the fourth wrench or by the action of the telescopic cylinder 530. When the axes of the second and third arms are coaxial, a dead point mechanism is formed, which stabilizes the position of the upper shell clamping block 521 and ensures a stable clamping effect on the heat insulation cover.

[0058] In some embodiments, refer to Figure 1The device also includes a base 600, which is fixed to a support frame. The bottom of the support frame is equipped with locking casters for easy movement of the device. The base 600 is rotatably connected to the base 100, and a second positioning mechanism 700 is provided between the base 600 and the base 100. Preferably, the base 600 and the base 100 are connected by bearings. The second positioning mechanism 700 includes a second limiting rod rotatably mounted on the base 600 and second limiting blocks 523 located on both sides of the base 100. Each second limiting block 523 has a third limiting groove that engages with the second limiting rod. In this configuration, the base 100 can rotate relative to the base 600, facilitating welding of the two sides of the heat insulation cover. The second positioning mechanism 700 allows the second limiting rod to engage with the third limiting groove of one of the second limiting blocks 523, preventing the base 100 from rotating and ensuring stability during welding of the heat insulation cover.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0060] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A welding fixture for a heat insulation cover, characterized in that, include: Base (100), An end flange positioning mechanism (200) is provided on one side of the base (100) for positioning the flange at the end of the workpiece; A pipe positioning mechanism (300) is located on the side of the base (100) away from the end flange positioning mechanism (200) and is used for positioning the pipe of the workpiece. A heat insulation cover support clamping mechanism (400) is provided on the base (100) and located between the end flange positioning mechanism (200) and the pipe positioning mechanism (300). Multiple sets of the heat insulation cover support clamping mechanism (400) are arranged along the extension direction of the heat insulation cover. The heat insulation cover clamping mechanism (500) is located above the heat insulation cover support clamping mechanism (400) and corresponds to multiple sets of the heat insulation cover support clamping mechanisms (400).

2. The welding fixture for the heat insulation cover according to claim 1, characterized in that, The heat insulation cover support clamping mechanism (400) includes a support mechanism (410) and a clamping mechanism (420). The clamping mechanism (420) includes two jaws (421) disposed on the support mechanism (410). The two jaws (421) are respectively disposed on both sides of the heat insulation cover in the radial direction and can clamp or open simultaneously.

3. The welding fixture for the heat insulation cover according to claim 2, characterized in that, The support mechanism (410) includes a lower shell support base (411) fixed to the base (100) and a lower shell support block (412) fixed to the upper end of the lower shell support base (411). The lower shell support base (411) is provided with a mounting cavity (4111). The clamping mechanism (420) further includes a turntable (422) rotatably disposed in the mounting cavity (4111). Two sets of first shafts (423) are eccentrically disposed on the turntable (422) and are equally angularly distributed along the circumference of the turntable (422). A first connecting rod (424) is hinged on the first shaft (423). The other ends of the two first connecting rods (424) are respectively hinged to the bottom ends of the two grippers (421). The middle part of the gripper (421) is hinged to the lower half shell support (411). The upper end of the gripper (421) can be pressed against the heat insulation cover.

4. The welding fixture for the heat insulation cover according to claim 3, characterized in that, The turntable (422) is eccentrically provided with a second shaft (425). The second shaft (425) is located between the two sets of first shafts (423) and is arranged at equal angles with the two sets of first shafts (423). The two side plates of the lower shell support (411) are provided with arc-shaped guide holes (4112). The two ends of the second shaft (425) movably pass through the arc-shaped guide holes (4112) and are hinged to one end of the second connecting rod (426). The other end of the second connecting rod (426) is hinged to the eccentric block (427) hinged on the base (100). The eccentric block (427) is provided with a first wrench (428).

5. The welding fixture for the heat insulation cover according to claim 3, characterized in that, The lower shell support block (412) has clearance grooves (4121) on both sides to allow the gripper (421) to make way.

6. The welding fixture for the heat insulation cover according to claim 1, characterized in that, The end flange positioning mechanism (200) includes a first mounting base (210) fixed to the base (100) and a sliding base (220) slidably disposed on the first mounting base (210). A first positioning mechanism (230) is provided between the sliding base (220) and the first mounting base (210). A flange clamping mechanism (240) and a flange positioning block (221) are provided on the sliding base (220). The flange clamping mechanism (240) includes a movable member (241) located on the side of the flange positioning block (221) away from the heat insulation cover support clamping mechanism (400). Two sets of first arc-shaped arms (242) are hinged to the movable member (241). A second arc-shaped arm (243) is hinged to the other end of each first arc-shaped arm (242). The middle portion of the second arc-shaped arm (243) is hinged to the flange positioning block (221). The end of the second arc-shaped arm (243) away from the first arc-shaped arm (242) extends to the flange positioning block (400). A pressure claw (244) extending toward the center of the flange positioning block (221) is fixed on the other side of the flange positioning block (221). A first drive rod (245) is fixed on the movable part (241). The other end of the first drive rod (245) moves through the first guide cylinder (222) fixed on the sliding seat (220) and is hinged to the first arm (246). The first arm (246) is hinged to the middle of the second wrench (247). One end of the second wrench (247) is hinged to the sliding seat (220).

7. The welding fixture for the heat insulation cover according to claim 1, characterized in that, The pipe positioning mechanism (300) includes a support plate (310) fixed on the base (100). The support plate (310) is provided with at least one set of corresponding pipe positioning blocks (311) and pipe clamping blocks (312). The pipe clamping blocks (312) clamp or release the pipe of the workpiece by means of quick clamps (320).

8. The welding fixture for the heat insulation cover according to claim 7, characterized in that, The quick clamp (320) includes a hinge seat (321) disposed on the support plate (310). A clamping arm (323) is hinged to one corner of the hinge seat (321) away from the support plate (310) and the pipe positioning block (311) via a third shaft (322). The other end of the clamping arm (323) is fixed to the pipe clamping block (312). A third wrench is hinged to one corner of the hinge seat (321) near the support plate (310) and the pipe positioning block (311) via a fourth shaft (324). (325) A drive arm (327) is also hinged to the clamping arm (323) via a fifth axis (326). The drive arm (327) is located on the side of the hinge seat (321) away from the support plate (310), and the side of the hinge seat (321) away from the support plate (310) is provided with a guide surface (3211) that cooperates with the drive arm (327). The other end of the drive arm (327) is hinged to the side of the third wrench (325) away from the hinge seat (321) via a sixth axis (328).

9. The welding fixture for the heat insulation cover according to claim 1, characterized in that, The heat insulation cover pressing mechanism (500) includes a fixed seat (510) connected to the base (100), a lifting seat (520) that moves up and down relative to the fixed seat (510), and an upper shell pressing block (521) fixed on the lifting seat (520). The lifting seat (520) is provided with at least one second drive rod (522). The upper end of the second drive rod (522) moves through the second guide cylinder (511) on the fixed seat (510) and is fixed to the limiting block (523). The limiting block (523) is also provided with a telescopic cylinder (530). The other end of the telescopic cylinder (530) is connected to the fixed seat (510). A manual control mechanism (540) is provided between the fixed seat (510) and the lifting seat (520).

10. The welding fixture for the heat insulation cover according to claim 1, characterized in that, It also includes a base (600), which is rotatably connected to the base (100), and a second positioning mechanism (700) is provided between the base (600) and the base (100).

Images